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Title: High-spin yrast structure of Hg 204 from the decay of a four-hole, 22 + isomer

Abstract

We present that a high-spin isomer with τ > 700 ns has been found in 204Hg, populated in reactions of 1360-MeV 208Pb and 330-MeV 48Ca beams with a thick 238U target and a 1450-MeV 208Pb beam on a thick 208Pb target. The observed γ-ray decay of the isomer has established the yrast states below it, including another isomer with τ = 33(3) ns. The experimental results are compared with shell-model calculations that include four holes in the configuration space between 132Sn and 208Pb. The available spectroscopic information, including transition strengths, total conversion, and angular correlation coefficients, together with the observed agreement with the calculations, allows spin, parity, and configuration assignments to be proposed for the experimental states. Finally, the τ > 700 ns isomer is the 22+ state of maximum spin available from the alignment of the four valence holes with the configuration πh$$-2\atop{11/2}$$vi$$-2\atop{13/2}$$.

Authors:
 [1];  [2];  [3];  [4];  [2];  [1];  [2];  [4];  [5];  [5];  [1];  [4];  [5];  [6];  [1];  [5];  [4]
  1. The Niedwodniczanski Institute of Nuclear Physics, PAN, Krakow (Poland)
  2. The Australian National University, Canberra (Australia). Department of Nuclear Physics, Research School of Physical Sciences and Engineering
  3. The Niedwodniczanski Institute of Nuclear Physics, PAN, Krakow (Poland); The Australian National University, Canberra (Australia). Department of Nuclear Physics, Research School of Physical Sciences and Engineering
  4. Argonne National Lab. (ANL), Argonne, IL (United States). Physics Division
  5. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  6. GANIL (France)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1378609
Alternate Identifier(s):
OSTI ID: 1224359
Grant/Contract Number:  
AC02-05CH11231; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C, Nuclear Physics
Additional Journal Information:
Journal Volume: 92; Journal Issue: 4; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Wrzesiński, J., Lane, G. J., Maier, K. H., Janssens, R. V. F., Dracoulis, G. D., Broda, R., Byrne, A. P., Carpenter, M. P., Clark, R. M., Cromaz, M., Fornal, B., Lauritsen, T., Macchiavelli, A. O., Rejmund, M., Szpak, B., Vetter, K., and Zhu, S. High-spin yrast structure of Hg204 from the decay of a four-hole, 22+ isomer. United States: N. p., 2015. Web. https://doi.org/10.1103/PhysRevC.92.044327.
Wrzesiński, J., Lane, G. J., Maier, K. H., Janssens, R. V. F., Dracoulis, G. D., Broda, R., Byrne, A. P., Carpenter, M. P., Clark, R. M., Cromaz, M., Fornal, B., Lauritsen, T., Macchiavelli, A. O., Rejmund, M., Szpak, B., Vetter, K., & Zhu, S. High-spin yrast structure of Hg204 from the decay of a four-hole, 22+ isomer. United States. https://doi.org/10.1103/PhysRevC.92.044327
Wrzesiński, J., Lane, G. J., Maier, K. H., Janssens, R. V. F., Dracoulis, G. D., Broda, R., Byrne, A. P., Carpenter, M. P., Clark, R. M., Cromaz, M., Fornal, B., Lauritsen, T., Macchiavelli, A. O., Rejmund, M., Szpak, B., Vetter, K., and Zhu, S. Mon . "High-spin yrast structure of Hg204 from the decay of a four-hole, 22+ isomer". United States. https://doi.org/10.1103/PhysRevC.92.044327. https://www.osti.gov/servlets/purl/1378609.
@article{osti_1378609,
title = {High-spin yrast structure of Hg204 from the decay of a four-hole, 22+ isomer},
author = {Wrzesiński, J. and Lane, G. J. and Maier, K. H. and Janssens, R. V. F. and Dracoulis, G. D. and Broda, R. and Byrne, A. P. and Carpenter, M. P. and Clark, R. M. and Cromaz, M. and Fornal, B. and Lauritsen, T. and Macchiavelli, A. O. and Rejmund, M. and Szpak, B. and Vetter, K. and Zhu, S.},
abstractNote = {We present that a high-spin isomer with τ > 700 ns has been found in 204Hg, populated in reactions of 1360-MeV 208Pb and 330-MeV 48Ca beams with a thick 238U target and a 1450-MeV 208Pb beam on a thick 208Pb target. The observed γ-ray decay of the isomer has established the yrast states below it, including another isomer with τ = 33(3) ns. The experimental results are compared with shell-model calculations that include four holes in the configuration space between 132Sn and 208Pb. The available spectroscopic information, including transition strengths, total conversion, and angular correlation coefficients, together with the observed agreement with the calculations, allows spin, parity, and configuration assignments to be proposed for the experimental states. Finally, the τ > 700 ns isomer is the 22+ state of maximum spin available from the alignment of the four valence holes with the configuration πh$-2\atop{11/2}$vi$-2\atop{13/2}$.},
doi = {10.1103/PhysRevC.92.044327},
journal = {Physical Review C, Nuclear Physics},
number = 4,
volume = 92,
place = {United States},
year = {2015},
month = {10}
}

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Works referenced in this record:

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    Works referencing / citing this record:

    Study of isomeric states in 198,200,202,206 Pb and 206 Hg populated in fragmentation reactions
    journal, February 2018

    • Lalović, N.; Rudolph, D.; Podolyák, Zs
    • Journal of Physics G: Nuclear and Particle Physics, Vol. 45, Issue 3
    • DOI: 10.1088/1361-6471/aaa9df

    Doubly magic Pb 208 : High-spin states, isomers, and E 3 collectivity in the yrast decay
    journal, June 2017